I'd like to establish the common name for director/writer B.W.L./Bill (L.) Norton.

BILL NORTON (20 titles, 6 confirmed)
- Angel: Season 2 (confirmed by AiAustria)
- Angel: Season 3 (confirmed by AiAustria)
- Angel: Season 4 (confirmed by AiAustria)
- Angel: Season 5 (confirmed by AiAustria)
- Buffy the Vampire Slayer: Season Six (confirmed by AiAustria)
- Ghost Whisperer: The Complete First Season
- The Guardian: The Final Season
- Haunted: The Complete Series
- Las Vegas: Season Five
- Law & Order: Criminal Intent: The Fourth Year
- Law & Order: Criminal Intent: The Fifth Year
- Law & Order: Criminal Intent: The Sixth Year
- Medium: The Complete First Season
- Roswell: The Complete Third Season
- Threshold: The Complete Series
- The Unit: Season 1
- The Unit: Season 2
- The Unit: Season 3
- The Unit: Season 4
- Welcome to Paradise (confirmed by T!M)

BILL L. NORTON (13 titles, 3 confirmed)
- False Arrest (confirmed by JOHNNYV)
- Gone in the Night
- Hercules and the Amazon Women
- Hercules in the Underworld
- Law & Order: Criminal Intent: The Fifth Year
- Medium: The Complete First Season
- Profiler: Season 4
- Roswell: The Complete Second Season
- SeaQuest DSV: Season One
- Stolen Innocence (confirmed by JOHNNYV)
- Tour of Duty: The Complete First Season
- Tour of Duty: The Complete Second Season
- Thirst (confirmed by JOHNNYV)

B. W. L. NORTON (6 titles, 4 confirmed)
- Baby: Secret of the Lost Legend (confirmed by T!M)
- Back to the Beach (confirmed by Sidrat)
- Gargoyles (confirmed by JOHNNYV)
- Losin' It
- More American Graffiti (confirmed by T!M)
- The Twilight Zone: Season 1

B.W.L. NORTON (2 titles, 2 confirmed)
- Convoy (confirmed by AiAustria)
- Messiah of Evil aka Dead People (confirmed by JOHNNYV)

B. L. NORTON (1 title, 1 confirmed)
- Cisco Pike

INVALID
- Angel: Season 1 (no credit)

Angel


S02E13@0:06:21
Directed by
Bill Norton


S03
E02@0:08:24
Directed by
Bill Norton

E12@0:07:29
Directed by
Bill Norton


S04

E05@0:08:19
Directed by
Bill Norton

E12@0:07:48
Directed by
Bill Norton


S05E05@0:06:52
Directed
by
Bill Norton

Back to the Beach: B. W. L. Norton as Story by.

Messiah of Evil aka Dead People: B.W.L. NORTON (no spaces) as  Actor - no role-description.
Checked endcredits You Tube internet.

The Guardian: The Final Season Episode 19
Directed by BILL NORTON

... did not check the other episodes.

- Roswell: The Complete Second Season: Episode 5: BILL L. NORTON
- Roswell: The Complete Third Season: Episode 5: BILL NORTON
- The Unit: Season 1: Episode 10: BILL NORTON
- The Unit: Season 2: Episodes 11 & 18: BILL NORTON
- The Unit: Season 3: Episode 5: BILL NORTON
- The Unit: Season 4: Episode 12: BILL NORTON

visual check of episode opening credits

Gone in the Night    DIRECTED BY  BILL L. NORTON  part1 0:03:03  part2 0:03:45  [5060098700744]



Profiler: Season 4
    ep. 9 Quid Pro Quo    directed by BILL NORTON  0:04:09  [youtube]

    ep. 18 Pianissimo    directed by BILL NORTON  0:03:46  [youtube]


Tour of Duty: The Complete First Season      (only checked two episodes)
    ep. "Notes From the Underground", "Pushin' Too Hard"  CO-EXECUTIVE PRODUCER  BILL L. NORTON  [youtube]  invalid

    ep. "Notes From the Underground"  DIRECTED BY  BILL L. NORTON  [youtube]


Losin' It    screenplay by  B.W.L. NORTON    story by  B.W.L. NORTON  0:02:53  [youtube]


The Twilight Zone: Season 1 ep. Teacher's Aide    Directed By  B. W. L. NORTON  [youtube]